From 53646320da1f0085246f0e8f0ea191a8a5cde9b9 Mon Sep 17 00:00:00 2001
From: vwh <vwhe@proton.me>
Date: Sun, 21 Jul 2024 20:00:57 +0300
Subject: [PATCH 1/2] Load remote files using cors proxy

---
 js/main.js | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/js/main.js b/js/main.js
index 01e4794..acd65df 100644
--- a/js/main.js
+++ b/js/main.js
@@ -83,7 +83,11 @@ function initialize() {
     if (loadUrlDB != null) {
         setIsLoading(true);
         const xhr = new XMLHttpRequest();
-        xhr.open("GET", decodeURIComponent(loadUrlDB), true);
+        xhr.open(
+            "GET",
+            `https://corsproxy.io/?url=${decodeURIComponent(loadUrlDB)}`,
+            true
+        );
         xhr.responseType = "arraybuffer";
         xhr.onload = function (e) {
             loadDB(this.response);

From 50592a346f3b9d92b70aad024770615117140254 Mon Sep 17 00:00:00 2001
From: vwh <vwhe@proton.me>
Date: Mon, 22 Jul 2024 11:57:36 +0300
Subject: [PATCH 2/2] Making using proxy cors optional

---
 js/main.js | 46 +++++++++++++++++++++++++++++++---------------
 1 file changed, 31 insertions(+), 15 deletions(-)

diff --git a/js/main.js b/js/main.js
index acd65df..b369029 100644
--- a/js/main.js
+++ b/js/main.js
@@ -81,21 +81,37 @@ function initialize() {
     };
     const loadUrlDB = $.urlParam("url");
     if (loadUrlDB != null) {
-        setIsLoading(true);
-        const xhr = new XMLHttpRequest();
-        xhr.open(
-            "GET",
-            `https://corsproxy.io/?url=${decodeURIComponent(loadUrlDB)}`,
-            true
-        );
-        xhr.responseType = "arraybuffer";
-        xhr.onload = function (e) {
-            loadDB(this.response);
-        };
-        xhr.onerror = function (e) {
-            setIsLoading(false);
-        };
-        xhr.send();
+        const sendRequest = (useProxy = false) => {
+            setIsLoading(true);
+            const url = useProxy ? "https://corsproxy.io/?" + loadUrlDB : loadUrlDB;
+            const xhr = new XMLHttpRequest();
+            xhr.open(
+                "GET",
+                decodeURIComponent(url),
+                true
+            );
+            xhr.responseType = "arraybuffer";
+            xhr.onload = function (e) {
+                loadDB(this.response);
+                return true;
+            };
+            xhr.onerror = function (e) {
+                setIsLoading(false);
+                return false;
+            };
+            xhr.send();
+        }
+        const noCORSRequest = sendRequest();
+        if (!noCORSRequest) {
+            const proxyConfirm = window.confirm(
+                "Unable to load the database from the provided URL due to possible CORS restrictions.\n" +
+                "Would you like to retry using a proxy?\n\n" +
+                "Note: Using the proxy may expose your database to corsproxy.io services."
+            );         
+            if (proxyConfirm) {
+                sendRequest(true);
+            }
+        }
     }
 }